This guide provides instructions for making a laser modulator and receiver to demonstrate the wireless transmission of information, for example transmission of sound over a fibre-optic link.

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This is an experiment to experimentally determine the speed of light in air with the use of a 1Mhz modulated laser and a beam splitter. 

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Instructions on how to make a low cost Arduino-controlled light gate.  See accompanying zip file GL226a for the Arduino code. 

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Bulletin 186 - Summer 2026- From the director- Measuring the speed of light in a school lab- Wildlife surveys- Using non-clinical blood- Student Safety Sheet updates- HSE & COSHH update- Microscal.. more

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This list was produced with support from the SCORE to provide schools with a benchmark list of equipment necessary to teach effective practical science. The spread sheet is explained in an accompanyin.. more

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